Nah. Two of the kids at school. Ruri is a teapot come to life because it was loved, Alana is her friend/caretaker. Click on their names in the “characters” section below the comic and you can find their first appearance and following where they explain it.

soo?? will she (Ruri) ever talk bout her siblings ( Chadogu ) ,, cuz as much as they love tea ceremony (Chado ) she can’t be the only one out of the set .. out of the set of 7 (one cup ,Chawan) i would say at least 3 made it,,, ( the tea storage jar, Chigusa,, the water pot, “Ruri,” Kyusu,, an a cup, Chawan..

Damn that girl can EAT!
Also I find it interesting that a Sentient Teapot would choose to practice an activity that requires precision and BALANCE. She not just holding human form. She’s training her Kinesthetic Sense.

no.. all she (Ruri) had, would have been water… the tea is mixed in the cup (Chawan)…
an Ruri’s style of teapot would be called ” Uwade no Kyusu.” or handle on top teapot,, an IF she is a pottery pot (not metal) could also be called “Dobin” = earthen pot…